Protein kinase ERK is activated by phosphorylation of ____________

A signaling cascade is illustrated by protein kinase protein kinase protein kinase and MAP. What purpose does this cascade serve?

A

The cascade makes the target of the signal more specific.

B

The cascade amplifies the signal.

C

The cascade reduces the necessary activation energy for the overall reaction.

D

The cascade generates the necessary energy for activating transcription.

Phytase, an enzyme produced by Aspergillus niger can be adsorbed on microcrystalline cellulose powder (MCCP). The adsorption follows a Langmuir isotherm and the maximum concentration of the protein that can be obtained on the adsorbent is 70 mg cm^-1. At a concentration of 50 mg L^-1 of protein in the solution, the concentration of protein on the adsorbent reaches 35 mg cm^-1. It is desired to recover 90% of the protein from 1.5 liter of the cell free culture filtrate containing 220 mg L^-1 protein by addition of MCCP to the solution. The concentration of the protein adsorbed on the solid at equilibrium will be:

A

21.4 mg cm^-3

B

214 mg cm^-3

C

2.14 mg cm^-3

D

None of the above

Directions : In each of the following questions a statement is given, followed by two conclusions. Give answer :

Statements : About 50 per cent of the animal by-products - hair, skin, horns etc. is edible protein. American chemists have developed a method of isolating 45 per cent of this protein. They used an enzyme developed in Japan to break down soya protein.

Conclusions :
I. Americans have not been able to develop enzymes.
II. Animal by-products protein has the same composition as soya protein.

A

Only conclusion I follows

B

Only conclusion II follows

C

Either I or II follows

D

Neither I nor II follows

E

Both I and II follow

Oxidative phosphorylation and substrate-level phosphorylation are two different processes of ATP synthesis.

A

True

B

False

Of all the receptors in Receptor Tyrosine Kinase family, the tyrosine kinase domain is the most strongly conserved sequence.

A

True

B

False

Serine kinase receptor has several features in common with tyrosine kinase receptor.

A

True

B

False

Consider the following proteins: I. Chromo Protein II. Peptone III. Proteinase Considering that there are three types of proteins namely Simple Protein, Conjugated Protein, and Derived Protein, which among the above is the odd one out with respect to the types mentioned above?

A

I

B

II

C

III

D

All I, II and III belong to the same group

Protein A will fold into its native state only when protein B is also present in the solution. However, protein B can fold itself into native confirmation without the presence of protein A. Which of the following is true?

A

Protein B serves as precursor for protein A

B

Protein B serves as molecular chaperon for protein A

C

Protein B serves as ligand for protein A

D

Protein B serves as structural motif for protein A

Protein’s solubility depends on the relative balance between protein-solvent and protein-protein interactions.

A

True

B

False

cGMP-dependent protein kinase is also called ____________

A

Protein kinase B

B

Protein kinase A

C

Protein kinase G

D

Protein kinase C

Protein kinase ERK is activated by phosphorylation of ____________

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